Portable battery arm sling



FIG. 1 is a perspective view illustrating our new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a back side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

We claim the ornamental design for a portable battery arm sling, asshown and described.